I’m doing blog commenting but all blog commenting links give me Nofollow links even forum signature also give me Nofollow, how can I get Dofollow backlinks. And please suggest me which links are beneficial Dofollow or Nofollow?

Dofollow links are crawled by Google whereas no follow aren't, but help to get traffic tto the website. So there is no harm to get nofollow links. But dofollow can give your keywords good ranking and good traffic to your website too. You can get the list of blog commenting and forum sites on some blog and Google. So do some Google for them. you can also subscribe Paulie Ciara for monthly free dofollow forums.

If you ask dofollow or nofollow which be better, the correct answer is both of Reviews those links are very good. That you are dominant websites with dofollow certainly is not natural, and vice versa. So that DoFollow and nofollow backlinks should be balanced and it looks natural and of course it would be better. And of course the link should be obtained in a way that does not violate the established rules and it should be natural.

We can not say which is better. It everything depends on the site from which you are getting the backlink. For example, getting one nofollow link from high authority website is certainly more valuable than 10 dofollow links from low quality web directories.